Welding fixture



se t. 131927. f p F. .1.3JAREcKl WELDING FIXTURE Y Filed Feb. 28, 1927 4sheetsheet 1 Sept. l 3 1927. 1,642,549

F. '.1. JARECM WELDING FIXTURE i Filed Feb. 2'8, 1927 4 Sheets-sheet 2Sept. 13, 1927' F, J. JARECKI WELDING FIXTURE sept. 13, 1927.

F. J. JARECKI WELDING FIXTURE 4 Sheets-Sheet,v 4

Filed Feb. 28, l1927 Patented Sept. 13, 1927.

rnANx '.T. Vzrnnncxr, or GRAND Ramps, MCHIGAN.

WELDING rxrunn;

Application inea February 2s, 1927.. serial- 110.171.542.

This invention relates to welding `apparatus and is more particularlyconcernedwith apparatus over which refrigerator linings .may be placedand have a side or back welded thereto. Thepresent construction is M;particularly designed for. holding refrigeraf tor linings of theso-ca-lled L-shape type and clamping a back in proper position with'respect thereto, that the edges ofthe back may be welded to the.adjacent edges of the bote tom, top and sides of the lining.

It is an object and purpose of the Vpresent invention to yprovide iaw-elding fixture of the character outlined with which the parts of thelinings may be securely held and 'w clamped in place so as to be readilywelded along their engaging orcontacting edges. The structure includes.many noyelfcon'structions .and arrangements of parts foreffectively-attaining this end. A further Object e1 of the invention istoprovide ay fixture of this character whereiny suitable. adjustments'are provided for variations in sizes or vfor different sizes of linings-which are to be y welded, lthereby -obviating the necessity of havingseveral 'of the fixtures for rseveral different sizes of linings whichdor not vary greatly in dimensions. f x0 Fortran understanding of theinvention reference may be had tothe following description taken inconnection with the v'accompanying drawings,:in which, Fig. 1 is a sideelevation of the welding fixture showing the same holding a refrigeratorliningv in place ready for welding.

Fig. 2 is a fragmentary enlarged elevation of a detail of theconstruction, a 'latching device for holding the inner clamping membersin their extended position againstk y the inner sides of the lining.

.Fig. 3 is a plan viewof` the upper clamping head' and the sides clampsmounted thereon. Y

Fig. 4 is a perspective view ofthe lining which is held onthe fixture,the backthereof being shown separated and as it is before it is weldedin place. i

Fig. 5 'is a plan view ofthe welding fixtureY before the upper clampingVhead is applied and before the outwardly projecting inner i clamps areextended.

Fig. 6 is a similar view showing said inner clamps extended outwardly toVengage against the inner sides of the lining.

5 `Fig. 7 is a fragmentary enlarged "Vertical v'7e-'7.3 of Fig. 3, .and

. verticaly axis. the member l2 with the inner ends off the section.substantially on the plane of line Fig. 8 is a fragmentary enlargedsection illustrating the `airspace' underneath ya joint which is to bewelded.. i

Like reference characters refer to .like parts yin the different.figures of the Adrawings. j In orapparatus a vertical hollow postorpedL estal -1 is vprovidedfhaving the usual v,base -2 which is attachedtothe floor. At the up per end .of the pedestal 1 a head A3 .ispermanently secured, `hav-ing outward extending and upwardly turnedarms, 4 to which a horizontal table fis secured. The table is ofL-shapehaving vtwo sections 5 and 6 lying atright angles to each other,Vas best shown in Fig. 5. l j 4 y.

j At the outer ends of each of the sections 5,and 6 extensions 7;and.8,.whichjform the inner clamps to engage the innersid'es of therefrigerator lining, are located,Y each .having a length equal Ato thewidth of its `respective section 5 or 6 of'thetable. These members 7 and,8 are detachably secured by means'of screws or equivalent .fasteningsto the outer ends of slides '9 and lOvvwhich .are slidaby mounted forlongitudinal movement ,on

spaced apart guides .11 made onthe sections 5 and 6 of the table. `@verthe head 3 de-V scribed and lying against the same, is e member 12 of'substantially cylindrical form which is adapted to beoscillated aboutits Two links 13 and 114 connect two slides 9 and 10. The points ofattachment ofthe links v13 and '14 to the memberv 12 are at a dist-ancefrom its center Vso that oscillation of the member 12 causes a rsimnltheconstruction of the welding lixture taneous reciprocatorymovement ofthe'two slides 9 and 10. A lug 15 projects radially direction of itsmovement comes against'the end of a stop screw -16 adjustably mountedthrough a bracket 17 permanently secured te thehead 3. This limitsrtheextent te which the clamping members 7 and 8 'may be moved outwardly, itbeing yevident that by changin the position of the screw 16 the outwardmevement of the members '7i and 8 may be Y 1 adjusted as desired.

The 'member 13 is fixed at the npperend of a vertical rock `shaft 18which extends downwardly throughv the head 3 and into the pedestal 1. Ahandle 19 is secured at the lowerl end ot the shaft 18 and extendshorizontally outward through an openingr 2O in a side ot the pedestal.This handle, when swung to one cxtreme of its moven'ient, isautomatically engaged by a latch dog 2l pivotally mounted on a block 22which, in turn. is mounted it'or slidable adjustment in guides 23 on theouter side of the pedestal 1 at one end olf the openingr 20therethrough. The adjustment is etl'eeted by a. threaded bolt let` whichthreads through the bloc; El and passes through a. permanently securedbracket 25 secured to the pedestal so that the block with the attacheddog 21 may be moved back and li'orth and have a limited adjustment. Thisailjust-inent is changed whenever the adjustment of the stop screw 1Gchanged so as to correspond therewith and `cause the handle 19 to beengaged by the latch dog Q1 at the time the lug 15 engages against'- theend ot the top screw 16.

vAround this table with its extensible clamping members T and 8 anL-shape lining which has not yet been supplied with a back may bcplaced. The lining (sce Fig. 4i) has a bottoni 2G, a shorter upper endor top 2T, a vertical side 28 connecting the bottoni and top at one otthe ends thereot', a

second vertical side 2i) `which extends downwardly :troni the other endof the top 2T for a distance parallel t0 the side Q8, and

` which is then bent outwardly to make a sec- "baul: ot' L-shape havingthe two sections ond top member $30 parallel to the bottoni and betweenthe bottom and the top 2T, this part of the lining being completed by anadditional side portion 31 parallel to the sides QS and 29, but set outfarther than the sidelt), as shown. This part of the lining is made'from a single length of flat metal bent into proper shape and weldedwhere the ends ol the length oi metal used come together. The lining' iscompleted by a and on lying at right `angles to each other. Itis evidentthat this back .tits the lining member ,tirst described and when it iswelded all around its edges to the lining member lirst described, a onepiece lining ot' sheet metal is provided of L-shape open at the trout.

The lining member without the back is placed around the L-shaped tableand over "the extensible clam Jiner members T and S as previouslydescribed. In order to support this lining member a number of vcrtiealbars Si are attached at dillerent sides` oit the table and to themembers 7 and 8. These bars are formed with vertical slots closed atboth ends. Attached to the lower portions of the bars 3l are other bars3G which, at their lower ends, are bent into U- form, as indieatcd at3T. The bars 3G may he vertically adjusted and held in any position towhich adjusted, clamping or set screws 3S being used which pass throughthe slots 35 described. lfn the U-shaped lower end portions 2li" oil thebars Elli horizontal supporting bars itl a 'e located. To the hars tit)headed screws are attached, the saine extending` upwardly throughopenings in the lower side. ol' the U-sections 237. and between the bars23S) and the bottoms oit' the U-secl'ionsI Ill'. around the screws 10,light coiled springs ll are located. the tendency ot which is to elevatethe bars 39. lVhen the lining member is placed around the table it restsat its lower edges on these bars and it is evidenti that. il desired,the lining member may be pressed downwardly at any point easily as thesprings il are strong enough onli7 to support the lining and no greatextra ltorce is required to bringthe upper edges ot the lining down ashort. distance it it should be necessary.

In Fig. 5 the lining member is shown placed around the table, thes-:ections 7 and S being in retracted position. Then by grasping thehandle lll and n'ioving it so :is to oscillate the ineniber l2. saidsections T and 8 are moved outwardly. as shown in lihg. t5, engaging andclampingagainst the inner sides oit the parts 2i" and 3l. ol the liningand causing the saine to come snugly against the edges oi the table allaround the saine, as shown in liig. (3.

Orer the L-shaped table a clamping head ot' like shape is designed to heplaced. having two sections l2 and i3 lying at (right angles to eachother (sec `Fig. tl). Said seet-lons are long ei'iough that their 'treeends reach nearly to the outer sides oit the, sections and S when thesaine are extended outwardly their full distance. This clamping head iscarried by a spider haring arms 4:4 and l5 convergii'lg and integrallycast with a center elli. The center `-;l-( ol? the spider is connectedto the lower end oi." a vertical shaft el?, which is equipped willi ahand wheel 4S near .its lower end and, at; its upper portion. threadingthrough a vertical sleeve 49 at the end oi a swinging arm 5() which ismounted 't'or swinging' movement about a vertical axis on the verticalshaft o1, as shown 1n Fig. l. lhe head )nav be moved so as to liedirectlyr over the table and then by operating the hand 'wheel 4:8 saidhead may be itiorced downwardly to clamp the baci; ot the linhur.consisting oit. the sections 32 and 38. in place over the L- shapedtable and with its edgefir. received within the edges oilf the sides andtop and bottoni ot the lining member which is located around the table.This fully shown in Fig. 7. l

Atthe sides and endsl ot the clanipingr head. consisting oit the twoports t2 and etti, clampingl bars are mounted toclanip against the outersides of the lining member which fig-642,549

A( plimed'aroundthe table toffirm-ly hold it wardly and 'theninadownward direction.

' adjacent each sideland `end/ofthe clampingl head, the sanieex'tendingupwardly andeut- Each'of these brackets 52- at'itsouteij lower end has'an .integral *laterally extending i flange 53.r AhorizontalShaft-54 isrotatably mounted through.:andfeiitends between the pair of brackets;Said 'shaft may be rocked Aby means-of a handle 55l and'ateac'h end -ofthe'ushaftan',` eccentric :5G is" mounted, the

` handle y515 being conveniently earriedby one of the eccentrics. A pairof headed pins 5T pass freely, one throughv each y'of the flanges :5'3"and vat ltheininner ends 'are'` connected to a y.horizontal clamping Ibar 58 which lies parallel f to a 'sidexor end of theclamping head.vAroun'deachI of the pins 57 and between its head and the flange 53through which it passes, is a coiled compression spring `59. Thetendency 'of the springs 59 is to move the pins and attached bar 58outwardly. But by rocking or oscillating the` shaft 54 and turning theeccentrics 56 the same coming against the outer side of the bar 58,moves it inwardly against the resistance of the springs 59 until itclamps against the outer -side of thevadjacent side, bottom or top ofthe lining member which is located around the table.

`From the foregoing it is evident that a welding fixture has beenprovided with' which a back or side or other'portion of a refrigeratorlining may be located and'held for welding to the remainder of therefrigerator lining. The parts which are to be welded together arefirmly held in place so that the same cannot change position during thewelding operation. The welding can be accomplished very easily by eitheran acetylene blow torch or other suitable welding apparatus, followingthe joint around the edges vof the member, in this case, the back havingthe sections 32 and 33, which is to be welded in place. The tablesections and the extensions 7 and 8 thereto, at their upper corners arecutaway and beveled as indicated at 60 so as to leave a continuous airspace underneath the lining adjacent andthe full length of the jointwhich is to be welded. This f prevents thel transmission of injurioustemperatures and heat to the table and aids in the welding operation asthe air underneath is not as good a conductor of heat as the met-al ofthe table would be if it were in direct Ycontact with the metal of thelining where the welding takes place.

While this fixture has been described in connection with an L-shapedrefrigerator lining it is evident that it is not limited totablearoundwhich `a liningiinember mayf'be y placed, a clamping: headover the table for holding a second lining member in fixed 'p0'w Asition with respect tothe table and the first lining member, andclamping devices' mountedk on said 'clamping head to engage with theouterside's of the first lining member to clamp them againstthe edges of:the table andin proper engagement with the edges vof the secondlining"memberso'that -the, two lining membersma'y bel heldin .positionfor welding. f y I 'i i" 2. In a machine ofl the class described, atable having two table sections lying at right angles to each other, amember at the outer end of each section slidably mounted thereon andmanually operable means for simultaneously moving said members outwardor inward with respect to the respective ends of saidtable sections.

3. In a machine of the class described, a horizontal table having twosections lying at right angles to each other, a slide slidably mountedon each of said sections, a member` having a length equal to the widthof the adjacent table section carried at the outer end of each slide, anoperatin member mounted under the table to turn a out a vertical aXis,means for turning saidl member back and forth about its vertical axis,and two links connected at one end vto said operating member, said linksbeing connected at opposite ends one to the inner end of each slide,substantially as described.

4. In a machine of the class described, a vertical support, a horizontaltable carried by said support havingV two sections lying at right anglestoeachother whereby said table is of L--shape, a member at the outer endof each section slidably mounted thereon for inward or outward movementwith respect to the adjacent end. of the table section on which it ismounted, means for moving said members simultaneously inward or outward,

a clamping head mounted over the table,

v moving said clamping ybars inwardly toward the edges of the table. f

5. In a construction of the class described,

afhorizontal table, a clamping head of like` outline located'over thetable, manually operable means for moving said head toward or away fromthe upper side of the table, clamping bars mounted on the sides and endsof the clamping head adapted to be moved inwardly toward the sides andends of the table, and manually operable means for moving saidclamping,r bars toward the edges of the table, substantially asdescribed.

6. In a machine of the class described, a horizontal table, a clampinghead of like outline located over the table, means for manually movingsaid head toward or away from the upper side of the table, pairs of suporting,r brackets connected to the upper site of the table adjacent sideand end edges thereof, said brackets being extended outwardly and thendownwardly, a rock shaft mounted oneaeh pair of brackets, cams on eachrock shaft, means for rocking each rock shaft. and a clamping barcarried by each pair of brackets engaged by the cams on the shaftcarried by said brackets whereby the bar is moved inwardly toward a sideor end of the table on rocking the shaft in one direction.

7. A construction containing the elements in combination defined inclalm 6 combined with sprinfr means operatively associated with each camping bar and acting to move the bar outward on rocking its associatedshaft in the opposite direction.

S. In a machine of the class described, a horizontal table, a clampinghead mounted over the table, means for carrying said head whereby thesame maybe swung to lie directly over the table or away therefrom, meansfor moving the head vertically toward or away from said table, clampingbars mounted on said head at the sides and ends thereof and dependingbelow the head so as to come opposite sides and ends of the table, andmanually operable means for moving said clamping bars inwardly towardthe edges of the table. i

In testimony whereof I affix my signature.

FRANK J JAREGKI.

